Insulated wall construction



A. E. SMALL I INSULATED WALL CONSTRUCTION Filed April 28, 1939 Patented Dec. 30, 1941 sTA'res PTEN'r Fries 2,263,511 l rNsULA'rEn WALL coNsraUorroN Arthur E. Small, Hammond, Ind., assignor to Standard Railway Equipment Manufacturing Company, Chicago, Ill., a corporation of Dela- Ware Application April 28,1939, Serial No. 270,604 1 Claim. (Cl. 189-34) My invention relates to insulated walls for use in connection with refrigerators or other insulated structures particularly relating to an insulated body for a railway car or automotive the wall-due to the conductivity of the metallic parts.

Another object is to reduce the thicknessl of the wall.

In the drawing: Fig. 1 shows a perspective view of a wall incorporating my invention.

a portion of 6-1 from surface contacts to line contacts. I realize that in actual practice' there will be some slight width of contact; however, the contacting area .will be small as compared to the construction in common use with a correspondingly large reduction in the amount of heat transferred from the-sheathing to the postsjor vice versa.

" The inside\sheathing I3 is made of wood, plywood, Celotex, or masonite or some similar insulation material. To provide additional insulation value for the wall the space Il defined by the posts 6 -'l, the outside metallic sheathing 2 and the inside sheathing I3 may be filled with an insulating material I5.

Fig. 3 shows a modied construction wherein the po'st 20 is provided with a convex surface 2| adjacent the metallic sheathing 22 to produce substantially a line contact between the post and the sheathing thus reducing the'transfer of heat Aliig. 2 is a section taken on the line 2--2/- adjacent sheets 3--4 and 4--5 overlapping and secured to the posts 6 and l respectively by means of rivets 8. to my improvement as the sheet margins may be joined by welding in which case the joint 9 may be eitherlapped or butted nor is it necessary to lgve thesheet joint 9 positioned adjacent the pos In the past it has been common practice to secure the metallic sheathing of a wall to me` tallic posts having a relatively large fiat surface contacting the sheets. In such a construction there is a relatively large transfer of heat from the sheathing 2 to the posts 6--1 or vice versa due to the large area of contact.

In my construction I reduce this heat transfer to a relatively small amount by providing the surface I0 of posts 6--1 adjacent the sheathing with ridges I2-I8 respectivelyv contacting the sheathing 2 and spacing said sheathing away from the surface I0 of the post. With my improvement I theoretically reduce `the areas -of contact between the sheathing 2 and the posts This construction is not essential therebetween.` I

Fig. 4 shows a modified construction wherein. spacers 30 separate the sheathing 3I from the post 32. The' spacers 30 are of relatively small area thereby limiting the transfer of heat between the sheathing 3| and post 32. c

Fig. 5 shows a modified. construction wherein the post 40 is 'provided with outwardly embossed portions 4I contacting the sheathing 42. As the contacting area of an embossed portion 4I and the sheathing 42 is relatively small the heat transfer therebetween will be small.

In the drawing I have shown U shaped posts. However, it is to be understood that posts of any suitable section provided with my improvement may be used.

The accompanying drawing illustrates the preferred form of the invention, though it is to be -understood'that the invention -is not limited to the exact detailsof construction shown and del' scribed, as it is obvious that various modications thereof, within the scope of the claim, will occur to persons skilled inthe art.

I claim:

In a wall for a refrigerator, a vsubstantially channel-shaped post comprising a web and spaced apart flanges, an outwardly projecting corrugation in said web extending the length of said post, metallic sheathing secured by spaced apart rivets to said corrugation in spaced relation to the uncorrugated parts of said web, outwardly extending reflanges on said flanges, wooden lining disposed in flatwise relation with said reanges and in spaced relation to said sheathing, and insulation between said sheathing and said lining adjacent said post.

- ARTHUR E. SMALL. 

